/*
 * Copyright 2014 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef SkDashPathPriv_DEFINED
#define SkDashPathPriv_DEFINED

#include "include/core/SkPathEffect.h"

namespace SkDashPath {
/* *
 * Calculates the initialDashLength, initialDashIndex, and intervalLength based on the
 * inputed phase and intervals. If adjustedPhase is passed in, then the phase will be
 * adjusted to be between 0 and intervalLength. The result will be stored in adjustedPhase.
 * If adjustedPhase is nullptr then it is assumed phase is already between 0 and intervalLength
 *
 * Caller should have already used ValidDashPath to exclude invalid data.
 */
void CalcDashParameters(SkScalar phase, const SkScalar intervals[], int32_t count, SkScalar *initialDashLength,
    int32_t *initialDashIndex, SkScalar *intervalLength, SkScalar *adjustedPhase = nullptr);

bool FilterDashPath(SkPath *dst, const SkPath &src, SkStrokeRec *, const SkRect *, const SkPathEffect::DashInfo &info);

#ifdef SK_BUILD_FOR_FUZZER
const SkScalar kMaxDashCount = 10000;
#else
const SkScalar kMaxDashCount = 1000000;
#endif

/* * See comments for InternalFilter */
enum class StrokeRecApplication {
    kDisallow,
    kAllow,
};

/* *
 * Caller should have already used ValidDashPath to exclude invalid data. Typically, this leaves
 * the strokeRec unmodified. However, for some simple shapes (e.g. a line) it may directly
 * evaluate the dash and stroke to produce a stroked output path with a fill strokeRec. Passing
 * true for disallowStrokeRecApplication turns this behavior off.
 */
bool InternalFilter(SkPath *dst, const SkPath &src, SkStrokeRec *rec, const SkRect *cullRect,
    const SkScalar aIntervals[], int32_t count, SkScalar initialDashLength, int32_t initialDashIndex,
    SkScalar intervalLength, SkScalar startPhase, StrokeRecApplication = StrokeRecApplication::kAllow);

bool ValidDashPath(SkScalar phase, const SkScalar intervals[], int32_t count);
} // namespace SkDashPath

#endif
